hydrogenchloride; sodium carbonate; acetone in water byproducts: hydrazodicarbonamide; addn. of aq. KOCN to warm (50-60°C) aq. soln. of hydrazine sulfate and Na2CO3; mixt. allowed to stand for 1 d; filtration of hydrazodicarbonamide; addn. of acetone; acetone semicarbazone extd. with ethanol and heated with concd. HCl;
参考文献
Liebigs Annalen der Chemie, , vol. 339, p. 243 - 294